From Bob Mantle's booklet (which also lists Nash a one of his sources) copy on The Napoleon Series Forum website link
Info below from page at: link
Fourth Reserve Infantry Regiment
Before the armistice of June 4 1813, the officers and cadre seconded from the Third East Prussian Regiment wore that Regiment's uniform (brick-red facings and yellow shoulder straps). The men wore the all-grey Reservist dress with breeches and gaiters described above, the cartridge boxes and the grey cloth packs had white straps. Individual companies were distinguished by a cloth roundel on the cap band and a matching bar across the grey shoulder straps, coloured white, red, yellow and ligth blue for the 1st to 4th companies respectively. In addition, the I Battalion carried French sabre-briquets captured at Halle in April 1813. During and after the armistice, the following uniforms were worn.
I Battalion
French shako with badge and cockade removed. Dark blue habit-veste, single breasted with short tails, red collar and turnbacks, the latter with white grenades. Round red cuffs with two buttons each with two white square ended lace loops. White metal buttons, white trousers, possibly French and black gaiters.
Knötel does not illustrate this uniform on his plate of the 4th R.I.R. so it is possible that it was replaced by the uniform described below.
II Battalion
Conical shako as for I/1 R.I.R. 'British' jacket, identical to that worn by the I/1 R.I.R., but with pointed lace. Blue trousers worn outside the gaiters. Regulation pack with white straps, grey British greatcoat. NCOs wore short swords on white belts, yellow lace on collars and cuffs and yellow waist sashes.
III Battalion
As for II Battalion with the following differences: black belts and straps. Privates removed the plume from the shako and the lace from the tunic. NCOs dyed the base of the plume black, retained the lace but discarded their sashes.
Between March and June 1815, the entire Regiment adopted the regulation uniform of the Third West Prussian Regiment (crimson facings and yellow shoulder straps).
returns to Flintloque to paint an Ogre.
